Elevator



(No Model.)

0. W. FOWLER.

ELEVATOR.

I Patnted Dec, 26, 1893.-

I UNITED STATES PATENT Enron.

CHARLES w. FO LER, or BALTIMORE, MARYLAND,'AssIeNoR, Y MnsNEASSIGNMENTS, TO THE STANDARD sonnw ELEVATOR MANUFACTURING COMPANY, OFCHICAGO, ILLINOIS.

ELEVATOR.

$.PEGIFIG'ATION forming part of Letters Patent No. 511,417, datedDecember 26, 1893.

Application filed March 29,1893.

To all whom it may concern:

Be it known that I, CHARLES W. FOWLER, of Baltimore, Maryland, haveinvented a new and useful Improvement in Elevators, which improvement isfully set forth in the following specification.

The present invention has reference to the construction of elevatorsorhoisting apparatus, and more particularly to the means for .(Omultiplying the speed of the primary sheaves, from which motion istransmitted to the car or platform.

The invention consists in a novel arrangement of the sheaves,and cables,through which :5 movement is transmitted from the engine or prime motorto the car or platform, and the objects sought to be attained areincreased simplicity, economy of construction and safety insuchtransmittingmechanismfor high speed machines.

The advantages of the inventioncan be most conveniently explained inconnection with the accompanying drawings, in which- Figure I, is anelevation of mechanism for transmitting motion,- constructed inaccordance with the invention. Fig. II is a vertical section (the cablesbeing omitted), and Fig.

III is a bottom view of the sliding frame or carriage of one of thetraveling sheaves.

The apparatus as represented in the drawings, is designed for use withan upright screw elevator or hoisting machine, such as shown in myPatent No. 439,647, granted November 14, 1890, A, A representing thesheaves car- 5 ried by the traveling nut Af In connection with thepresent invention, however, they represent merely the primary sheaves ofthe system, and maybe carried by the piston rod of a hydraulic elevator,or actuated in any of 40 the well known ways from a prime motor.

The cables at a, which pass around the primary sheaves, transmit themovement of the nut, or other device carrying said sheaves, to thecarriage B of the traveling sheaves C O,

the speed being doubled in this transmission.

, The connection is as follows: Cable a is fastened at one end to a partof the frame A", substantially as in my said prior patent, carried undersheave A, and at its other end attached to one end of the pivoted orbalance Serial No. 468,120. on, model.)

beam D, cable a being similarly connected with the other end of saidbeam, passing first around sheave A.

The frame-work of the slidingcarriage B is made up of wrought ironbars,the construction being evident from the drawings. Itcomprises thecurved cross-bars b, the straight cross-bars b, the vertical channelbars b connecting the ends of the cross-bars, and adapted to engage andslide upon vertical rails in the shaft, and the vertical side-bars 11 inthe upper end of which is the journal pin 0 upon which turnthe-intermediate traveling pulleys C C, and in the lowerend of which isthe pin (1 upon which beam D is pivoted.

From the carriage B, motion is transmitted by the intermediate cables ee to a second carriage F, whose construction is substan-' tially thesame as that of carriage B. The cables 6 e start at one end from fixedpoints, represented by the eye bolts ff on opposite sides of theelevator shaft, and pass in oppo- 1 site directions one around sheave O,the other around sheave O, the other ends of the cables being attachedto the opposite ends of 75 beam G, which is similar in construction tobeam D. By this construction I bring thetransmitting sheaves alldirectly in line, one beneath the other, economizing space, simplifyingthe construction and reducing the length of cable to a minimum. As inthe case of the primary cables at a, the secondary cables 6 e areindependent of each other, and it would require thebreakage of both torelease the car.

It will be understood that carriage F travels at twice the speed ofcarriage B, or four times the speed of the vertical movement of sheavesA A. Carriage F, carries a single sheave E around which runs thehoisting cable H' to which an elevator car or platform may be connected.The final multiplication of speed is given to this. cable by thethreefolding arrangement described in my said prior patent. The sidebars g of the carriage F are carried up beyond the sheave E, andprovided with an eye to whichone end of the hoisting cable H is madefast. Thence the cable passes around the stationary sheave J, downand'under sheave E, upward past sheave too J, which, as shown has asecond groove, and thence over the usual head sheaves at the top of theshaft to the car or platform. Thus, by themultiplying arrangementshown,thehoisting cable transmits to the car or platform a speed twelvetimes that of the nut or support A carrying the primary sheaves A A.

The primary sheaves A A are as shown, concave on the sides adjacent toeach other, so that the groove of each sheave is thrown inward, towardits support. This detail is of importance in view of the great strainborne by the journal pins h, the liability of breakage being reduced bybringing the point at which the strain is applied as close as possibleto the point of attachment of said pins to their support A Anotherincidental advantage of this construction is that the same pattern canbe used for the sheaves G 0. It will be seen that the rims of thesesheaves, as well as their hubs are in contact, while the hubs remain ofample thickness. The arrangement moreover, is very compact.

' It will be obvious that in applying the principle of my inventionmodifications may be made in the construction and arrangement of parts.

I claim as my invention-- 1. In a speed multiplying apparatus forhoisting machines, the combination with a reciprocating carriagecarrying two sheaves, of a second carriage to which motion istransmitted from the first at an increased speed, and two transmittingcables attached at one end to fixed supports on opposite sidesrespectively of the shaft or well, thence carried around said sheaves inopposite directions, and at their other ends attached to the secondcarriage, substantially as described.

2. In a speed-multiplying apparatus for hoistingmachines, thecombination of the two reciprocatingcarriages transmitting motion one tothe other, sheaves on the first carriage, a pivoted beam on the secondcarriage, and two transmitting cables attached to opposite endsrespectively of said beam, thence passing each around one of the sheavesof the first carriage, and attached at their other ends to fixed points,substantially as described.

3. In a speed multiplying apparatus for hoisting machines, thecombination of the primary sheaves, and primary cables attached at oneend to fixed points and passing around said primary sheaves, a slidingcarriage to which the other ends of the primary cables are attached, twosheaves arranged side by sideupon said carriage, two intermediate cablesattached at one end to fixed points and passing each around one of saidsheaves in opposite directions, a second carriage to which the otherends of said intermediate cables are attached, and means fortransmitting the movement of the second carriage to. a hoisting cable atan increased speed, substantially as described.

4. In a speed -multiplying apparatus for hoisting-machines, a slidingcarriage for the transmitting sheaves, said carriage comprising a pairof straight cross-bars, a pair of downwardly curved cross-bars, verticalchannel bars connecting the ends of all the crossbars, verticalside-bars secured to the crossbars and carrying at the upper end ajournal pin for said sheaves, and a balance beam pivoted in the lowerend of said side-bars, substantially as described.

In testimony whereof I have signed this specification in-the presence oftwo subscribing witnesses.

CHARLES W. FOWLER.

Vitnesses:

W. N. WAMSLEY, WM. 11. JONES.

